20r-45=155

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Solution for 20r-45=155 equation: 


Simplifying
20r + -45 = 155

Reorder the terms:
-45 + 20r = 155

Solving
-45 + 20r = 155

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '45' to each side of the equation.
-45 + 45 + 20r = 155 + 45

Combine like terms: -45 + 45 = 0
0 + 20r = 155 + 45
20r = 155 + 45

Combine like terms: 155 + 45 = 200
20r = 200

Divide each side by '20'.
r = 10

Simplifying
r = 10

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